Try-square

ABSTRACT

A TRY-SQUARE HAS A STOCK, A FIRST BLADE EXTENDING PERPENDICULAR TO THE STOCK AND A SECOND BLADE SET IN A SLOT EXTENDING ALONG THE UPPER EDGE OF THE STOCK IN THE SAME PLANE AS THE FIRST BLADE.

Feb.,2, 1971 A. QuENor TRY-squarz Filed Feb. 1e, 1959 FWG. A

FIG. 3

FIG. 2

United States Patent O Inf. Cl. B431 7202; Golb 3/04 U.S. Cl. 33-113 3 Claims ABSTRACT F THE DISCLOSURE A try-square has a stock, a first blade extending perpendicular to the stock and a second blade set in a slot extending along the upper edge of the stock in the same plane as the iirst blade.

Try-squares for carpenters and turners presently used comprise generally a stock supporting a metallic blade, graduated or not, positioned perpendicularly to this stock.

These stocks are made either of wood or of light metal and can be equipped with accessories such as for example ampouls or water levels.

In order to use a try-square on a horizontal plane or an inclined plane against the edge of which is placed the upper surface of the stock without the weight of the stock causing the trysquare to tip over, there has already been suggested to make a heel with a hat and this only for mechanics try-squares which do not have a graduated blade.

According to this embodiment, the metallic stock of the base is given a shoe which overlaps on either side of the stock. However, in all these embodiments it has never been thought of to graduate the stock of the base the thickness of which besides would not have made possible the measurement of exact distances.

Consequently the invention proposes to provide a trysquare for carpenters and turners which is of simple and inexpensive construction and which also makes possible the measurement of distances along the stock while giving the same services as the try-squares of the so called hat type.

To this effect the invention is concerned with a trysquare characterized in that the stock is surmounted by a graduated blade parallel to said stock and positioned within the plane of the blade.

The invention will be better understood by referring to the following description made by Way of non limiting example and to the accompanying drawings in which:

FIG. 1 shows a partial elevation of a try-square according to the invention with portions broken away.

FIG. 2 shows a transverse cross section of the trysquare taken approximately on the line II-II in FIG. l.

FIG. 3 shows a transverse cross section of a modification of the invention.

FIG. 4 shows a transverse cross section of another modification of the invention.

Reference is made to FIGS. 1 and 2.

The try-square shown comprises a stock 1, made for example from a hollow metallic section, and a vertical metallic blade 2, which may be graduated or not. Blade 2 is set in a slot in one end of the stock 1 midway between its opposite parallel sides and can be secured in the stock 1 in any known manner. Thus blade 2 can be secured between two elements such as 3 positioned on either side of blade 2 and connected therebetween through said blade 2 by screws or pins 4. The elements 3 are introduced in the section 1 the extremity of which is bevelled, blade 2 emerging from said section 1 through millings in the latter.

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Stock 1 has on the upper side thereof 5 a longitudinal second slot 6 located in the same plane as vertical blade 2 and opening into the slot receiving the blade 2. In this second slot is positioned a second blade 7 graduated 0n one or two sides. This blade 7 can be metallic or of any other material, for example synthetic material. As seen in FIGS. 1 and 2 the second slot 6V has a depth approximately half the width of the second blade 7.

The fastening of blade 7 can be obtained by any means such as force-fitting, gluing, riveting and others. In a modification, blade 7 is simply wedged in slot 6 and is provided at its rear end with an extension 8 which engages in a corresponding hollow 9' of blade 2. The front end of said blade 7 is also provided with an extension 10 which lits in a hollow 11 of closure element 12 of section 1. This element 12 can be the outlet of the casing of a linear measuring instrument with a tape 13 housed in the section 1. It goes without saying that it is element 12 which could have a projection cooperating with a hollow in the extremity of blade 7.

The measuring instrument 13 makes it possible to effect all measurements of distances from the try-square. The inside measurements are made by simple addition of the total length of the try-square.

As it can be seen readily the try-square of the invention operates in the same way as the so called try-squares with hats, the overlapping part of the blade 7 preventing the tipping over of the stock when the upper side 5 thereof is positioned against the edge of a horizontal plane.

Reference is made to FIG. 3.

According to this modiiication the heel 14 of the trysquare made for example of light metal or of synthetic material has an I-shaped section or any other section. A longitudinal milling 15 receives the graduated blade 16 fastened in said slot by any suitable means.

Reference is made to FIG. 4.

According to this other modiication the stock 17 of the try-square is made of an inner armature formed for example by two half armatures 18 and 19 welded back to back along their projections 20 and 21. The hollow remaining between the two half armatures 19 and 18 makes possible the positioning on the one hand of the vertical blade 22 and on the other hand of the graduated blade 23. The assembly thus formed is provided with a cover 24 of plastic material. The fastening of blade 23 is achieved in any suitable manner.

By way of example this fastening can be obtained by the synthetic coating 24 passing through openings 25 in the blade 23.

Although the invention has been described with respect to one embodiment thereof it is understood that the same is in no way limited thereto and that there can be brought to it all modification of shape or of material without thereby departing from its framework or its scope.

What is claimed is:

1. A try-square comprising an elongate stock having opposite side faces delining spaced parallel planes free of any projections beyond said planes, an upper plane face, a lower plane face and a bevelled end portion having a bevelled face deiining a plane perpendicular to said parallel planes and at a selected angle to said upper and lower plane faces, a lirst slot in said bevelled end portion parallel to said parallel planes and mid-way between said parallel planes, a lirst elongate calibrated fiat blade set in said slot and extending from said bevelled face at right angles to said stock, a second slot in said stock extending inwardly from said upper plane face and parallel to said parallel planes and midway between said parallel planes, said second slot lying the same plane as said first slot and opening at one end into said first slot, a second elongate calibrated flat blade set in said second slot and joining said irst blade, said second blade being narrower than said first blade and extending perpendicular to said first blade substantially from said first blade to the opposite end of said stock, and means securing said blades in their respective slots in said stock, said second blade having an extension and said first blade having a recess receiving said extension.

2. A try-square comprising an elongate stock having opposite side faces defining spaced parallel planes free of any projections beyond said planes, an upper plane face, a lower plane face and a bevelled end portion having a bevelled face defining a plane perpendicular to said parallel planes and at a selected angle to said upper and lower plane faces, a first slot in said bevelled end portion parallel to said parallel planes and midway between said parallel planes, a first elongate calibrated fiat blade set in said slot and extending from said bevelled face at right angles to said stock, a second slot in said stock extending inwardly from said upper plane face and parallel t said parallel planes and midway between said parallel planes, said second slot lying in the same plane as said first slot and opening at one end into said first slot, a second elongate calibrated flat blade set in said second slot and joining said first blade, said second blade being narrower than said first blade and extending perpendicular to said first blade substantially from said first blade to the opposite end of said stock, and means securing said blades in their respective slots in said stock, said second blade having an extension at one end and said stock having a hollow receiving said extension to retain said second blade.

3. A try-square comprising an elongate stock having opposite side faces defining spaced parallel planes free of any projections beyond said planes, an upper plane face, a lower plane face and a bevelled end portion having a bevelled face defining a plane perpendicular to said parallel planes and at a selected angle to said upper and lower plane faces, a first slot in said bevelled end portion parallel to Said parallel planes and midway between said parallel planes, a first elongate calibrated fiat blade set in said slot and extending from said bevelled face at right angles to said stock, a second slot in said stock extending inwardly from said upper plane face and parallel to said parallel planes and midway between said parallel planes, said second slot lying in the same plane as said first slot and opening at one end into said first slot, a second elongate calibrated fiat blade set in said second slot and joining said first blade, said second blade being narrower than said first blade and extending perpendicular to said first blade substantially from said first blade to the opposite end of said stock, and means securing said blades in their respective slots in said stock, said second blade having openings therein and said stock having a portion of synthetic material which passes through said openings to secure said second blade to said stock.

References Cited UNITED STATES PATENTS 733,302 7/1903 Van Court 33-112 788,017 4/1905 Breul 33-112 834,872 10/1906 Collie et al 33-112 2,246,260 6/ 1941 McGrath 33-112 FOREIGN PATENTS 140,085 1/1935 Austria 33-112 449,730 7/ 1948 Canada 33-112 HARRY N. HAROIAN, Primary Examiner 

